Organise costs to understand cash movement, recover agreed client expenses and retain supporting evidence.

Separate three questions
A cost can be paid by the business, chargeable to a client and allowable for tax. Those are separate tests.
Use categories that support decisions
Choose a stable set of categories; too many become inconsistent and one miscellaneous bucket hides patterns.
Reconcile records to evidence
Match amount and date to a receipt or supplier statement and note refunds or personal portions.
Review cash, not only tax totals
Find subscriptions, project costs and client reimbursements still waiting to be billed.
Separate three questions in practice
A consultant pays £120 for annual software, £54 for approved client travel and £30 for a mixed-use phone bill. The records separate the reimbursable journey, allocate the subscription across internal reporting periods and flag the phone cost for a personal-use review. One payment can therefore have several different business questions attached to it.
Review cash, not only tax totals review
Use a stable category list, but retain enough description to understand each transaction without opening every receipt. Reconcile totals to statements, record refunds and avoid treating “paid from the business account” as proof of tax allowability. Review unbilled client costs before issuing the final project invoice.
Separate record keeping from the later tax decision. Capture the full transaction and evidence first, then document any business proportion, reimbursement or exclusion with the reason. Review recurring suppliers for duplicate plans and price changes. Compare expense timing with cash forecasts, because an allowable annual cost can still create a short-term funding problem. When sharing records with an adviser, include the underlying documents and unresolved questions rather than presenting uncertain classifications as settled facts.
Put the process into practice
Open the matching Billoz workflow, then use the calculator or planning tool to check the relevant figures.
Sources
Written and reviewed by the Billoz editorial team at WILLIATION TECHNOLOGIES LTD. Published 1 May 2026; reviewed 19 September 2026.
